| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-powered double cladding (DC)-pumped Ytterbium-free L-band Erbium doped fiber amplifier (EDFA) for dense-wavelength-division multiplexing (DWDM).SOLUTION: The DC pumped Ytterbium-free L-band EDFA comprises a length of DC Erbium-doped fiber (EDF) that has a low-index, large-diameter core. In some embodiments, the DC EDF also comprises a trench that is located radially exterior to the cladding, thereby increasing cladding absorption while still effectively maintaining single-mode behavior.SELECTED DRAWING: Figure 1 |
